KANSAS CITY, Kan. (AP) — Wyandotte County officials have reached a settlement with the Sierra Club over allegations of excessive air pollution from two area power plants.

The agreement, which Wyandotte County approved Thursday, requires that the Quindaro Power Plant generating units stop burning coal by April 16, 2015, and that the Nearman Power Plant add controls to meet negotiated emissions limit for air emissions by Sept. 1, 2017.

The Board of Public Utilities and the Unified Government of Wyandotte County say in a release that the Sierra Club in 2012 alleged that emissions from the Nearman and Quindaro plants exceeded levels allowed under air permits for each plant. Wyandotte County and the BPU disputed the allegations.

The agreement has to be approved by a federal judge before becoming final.